The Batman: Arkham Asylum demo opens as the DARK KNIGHT and COMMISSIONER GORDON return The Joker back into confinement at ARKHAM ASYLUM. But things soon fall apart as THE JOKER gains the upper hand and springs a trap, setting Arkham Asylum's occupants upon Batman.

The demo offers gamers a taste of the fierce FreeFlow combat system, the cunning stealth of the Invisible Predator mechanic, and the feeling of becoming the WORLD'S GREATEST DETECTIVE as they navigate Arkham Asylum's imposing Intensive Treatment facility.

Players will also apparently be able to unlock a couple of character bios during the demo, as well as get a sneak peek at some of the main enemy bosses.

The full retail version of Batman: Arkham Asylum goes on general release on August 28th.

Bryn says: Count me in. I'll be waiting in line for this Friday's demo for sure. I've been keeping up with all the information, movies and media about Batman, and basically, I can't imagine the final game not pleasing me.